LCE17 Equivalent & Substitute Parts

Part Overview

The LCE17 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. Featuring a 17V reverse standoff voltage and 28.98V maximum clamping voltage at peak pulse current, the LCE17 operates across a temperature range of -55°C to 175°C in a through-hole DO-201 package format.

The LCE17 is classified as obsolete, necessitating identification of equivalent substitute components that maintain functional compatibility while offering active product status and continued manufacturer support.

Key Parameters

Parameter	LCE17 Value
Voltage - Reverse Standoff (Typ)	17V
Voltage - Breakdown (Min)	17.91V
Voltage - Clamping (Max) @ Ipp	28.98V
Current - Peak Pulse (10/1000µs)	54A
Power - Peak Pulse	1500W
Operating Temperature Range	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	DO-201AA, DO-27, Axial
RoHS Status	ROHS3 Compliant
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitute parts for the LCE17 are qualified based on the following critical parameters that determine functional equivalence:

Voltage - Reverse Standoff (Typ): Must equal 17V
Unidirectional Channels: Must equal 1
Type: Must be Zener
Mounting Type: Must be Through Hole
Operating Temperature Range: Must support -55°C ~ 175°C minimum
RoHS Status: Must maintain ROHS3 Compliance

Substitute parts may vary in clamping voltage, peak pulse current, and power dissipation within acceptable engineering tolerances for the application. Package format variations (DO-201, DO-15, P600) are permissible provided through-hole mounting is maintained.

Parameter Comparison

Parameter	LCE17	LCE17A	5KP17E3/TR13	P5KE17A-TP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Microchip Technology	Micro Commercial Co
Voltage - Reverse Standoff (Typ)	17V	17V	17V	17V
Voltage - Breakdown (Min)	17.91V	18.9V	18.9V	18.9V
Voltage - Clamping (Max) @ Ipp	28.98V	27.6V	30.5V	27.6V
Current - Peak Pulse (10/1000µs)	54A	54A	164A	16.1A
Power - Peak Pulse	1500W	1500W	5000W	500W
Operating Temperature Range	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-65°C ~ 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-201AA, DO-27, Axial	DO-201AA, DO-27, Axial	P600, Axial	DO-204AC, DO-15, Axial
Type	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

LCE17A (Littelfuse Inc.) is the primary direct substitute, maintaining identical reverse standoff voltage (17V), peak pulse current (54A), and power dissipation (1500W) as the LCE17. Both components share the same DO-201 package format and operating temperature range. LCE17A holds active product status with ROHS3 compliance and REACH unaffected designation, ensuring long-term availability and regulatory compliance.

5KP17E3/TR13 (Microchip Technology) qualifies as a substitute with matching 17V reverse standoff voltage and operating temperature range. This component offers enhanced peak pulse current (164A) and power dissipation (5000W), suitable for applications requiring higher transient energy absorption. The P600 package maintains through-hole mounting compatibility. Active product status and ROHS3 compliance are confirmed.

P5KE17A-TP (Micro Commercial Co) meets the core substitution criteria with 17V reverse standoff voltage and through-hole DO-15 package format. This component features reduced peak pulse current (16.1A) and power dissipation (500W) compared to the LCE17. Selection of this substitute is appropriate only for applications with lower transient current requirements. Active product status and extended operating temperature range (-65°C ~ 175°C) are confirmed.

Frequently Asked Questions (FAQ)

Q: Can LCE17A directly replace LCE17 in existing designs?

A: Yes. LCE17A maintains identical electrical specifications (17V standoff, 54A peak pulse current, 1500W power dissipation) and package format (DO-201). The primary difference is product status transition from obsolete to active, with improved long-term availability.

Q: What is the primary difference between LCE17 and 5KP17E3/TR13?

A: Both maintain 17V reverse standoff voltage and -55°C to 175°C operating range. The 5KP17E3/TR13 provides significantly higher peak pulse current (164A vs. 54A) and power dissipation (5000W vs. 1500W), making it suitable for higher-energy transient protection. Package format differs (P600 vs. DO-201), requiring PCB layout verification.

Q: Is P5KE17A-TP suitable for all LCE17 applications?

A: P5KE17A-TP qualifies as a substitute only for applications with peak pulse currents not exceeding 16.1A. The reduced power dissipation (500W vs. 1500W) limits its use to lower-energy transient environments. Verify application requirements before selection.

Q: Are all substitute parts RoHS compliant?

A: Yes. LCE17A, 5KP17E3/TR13, and P5KE17A-TP all maintain ROHS3 compliance, meeting environmental and regulatory requirements equivalent to the original LCE17.

Q: Do package format differences affect PCB compatibility?

A: Yes. LCE17 and LCE17A use DO-201 packages with identical footprints. The 5KP17E3/TR13 uses P600 package and P5KE17A-TP uses DO-15 package, both requiring PCB layout verification for hole spacing and component clearance before implementation.

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